California DMV gives 11,000 drivers 30 days to retake written test or lose licenses but won’t explain why

About 11,000 California motorists are being ordered to retake the state’s written driver’s license exam after the Department of Motor Vehicles said it discovered irregularities in a batch of test results.

Drivers who received notification letters have 30 days to pass the knowledge exam again or risk having their licenses canceled, according to the DMV. […] ...